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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >FeS@tubular mesoporous carbon as high capacity and long cycle life anode materials for lithium- and sodium-ions batteries
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FeS@tubular mesoporous carbon as high capacity and long cycle life anode materials for lithium- and sodium-ions batteries

机译:FES @管状介孔碳作为锂和钠 - 离子电池的高容量和长循环寿命阳极材料

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摘要

An ordered tubular FeS@tubular mesoporous carbon composite consisting of FeS nanoparticles and tubular mesoporous carbon (CMK-5) is synthesized as anode material for Li- and Na-ions batteries. For applications in Li-ion batteries, the FeS@CMK-5 anode maintains a high reversible capacity of 720 mAh g(-1) after 100 cycles at 200 mAg(-1), much better than that of pristine FeS (166 mAh g(-1)) and CMK-5 (472 mAh g(-1)). Na-ion storage measurements reveal that the FeS@CMK-5 composite delivers a reversible capacity of 445 and 391 mAh g(-1), respectively, at the current density of 1000 and 5000 mA g(-1) over 100 cycles. The excellent electrochemical properties of FeS@CMK-5 for Li- and Na-ions storage can be attributed to its special structural superiority, which effectively accommodates the volume change, improves the electrical conductivity, and shortens the diffusion paths of Li- and Na-ions during the insertion/extraction process. (C) 2019 Published by Elsevier B.V.
机译:由FES纳米颗粒和管状介孔碳(CMK-5)组成的有序管状FES @管状介孔碳复合物被合成为Li-和Na-离子电池的阳极材料。 对于锂离子电池中的应用,FES @ CMK-5阳极在200mAG(-1)的100个循环后保持高可逆容量为720mAhg(-1),比原始FES更好(166mAhg (-1))和CMK-5(472mAhg(-1))。 Na离子储存测量表明,FES @ CMK-5复合材料分别在1000和5000mA G(-1)的电流密度上以1000和5000 mA G(-1)的电流密度提供可逆容量。 对于Li-和Na-anions储存的FES @ cmk-5的优异电化学性能可归因于其特殊的结构优势,有效地适应体积变化,提高电导率,并缩短了Li-和Na-的扩散路径 插入/提取过程中的离子。 (c)2019年由elestvier b.v发布。

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